Machine for making articles of plastic compounds of different colors



Nov. 125," 1924. i 1,5! @843 A. c. BUTTFIELD MACHINE FOR MAKING ARTICLES OF PLAST IC COMPOUND 0f DIFFERENT COLORS Filed May 5, 193g atente Nov. 25, 1924.

TED STA a PATENT OFFICE.-

ALFRED c. BUTTFIELR: or BUTLER, NEw JERSEY, AssIeNoE TO AMERICAN HARD-= RUBBER 00., or NEW YORK, N. Y., A CORPORATION or NEW YORK.

MAcnINE- FOR MAKING ARTICLES or PLASTIC coMroUNDs or DIFFERENT coLoRs.

Appllication filed May a,

To all whom it may concern:

Be it known that I, ALFRED OBUTTFIELD residing at Butler, in the county of Morris This invention relatesto a machine similar I to that shown in my copending application, Serial Number 558,292, for making rods, tubes, or the like, of plastic compounds of two or more colors, and the objects, of the invention are to improve the appearance of said rods or tubes by giving them the grained appearanceof wood.

To the accomplishment of the abox e ob- ;jects and to such others as may hereinafter appear, the invention comprises a machine for incompletely mixing or streaking a plu- 'rality of plastic compounds of contrasting 1922. Serial No. 558,293.

mounted a head block 2 provided with a feed opening 3 which communicates with a centrally located screw chamber 4 in which bevel pinion 9 which, meshes with a bevel pinion 10 secured to a'driving shaft 11 also mounted in the frame through the medium a of which the feed screw 5- is operated.

In the present instance and in accordance with the present invention, the feed screw 5 extends substantially the entire length of the 'head block 2,the same being arranged to terminate adjacent annular openings 12 provided in a guide block 13 secured to the head block 2. The. central portion of the colors, each with the other, separating the/"guide block 13 is adapted to removably same. by forcing the incomplete or streaked mixture through a plurality of passageways, and subsequently joining the various mixtures just previous to the time the same is forced through a common orifice, wihich thereby acts to give to the finished article a very pleasing appearance resembling the,

of a machine made in accordance with the.

invention. a

Figure 2 is an end-view of the head block. Figure 3 is a transverse sectional view on the line 3-3 of Fig. 1.

' Figure 4 is a transverse sectional view on the line 4-4 of Fig. 1.

Figure 5 is a view of the finished article showing the grained appearance.

Referring to the drawings, 1 designates the frame of the machine upon which is,

hold a feed block 14 which is provided with a plurality of spaced passageways 15 through which the material fed by the feed screw 5 is fed or squeezed toa discharge block 16 having a contractedorifice 17.

In the present instance the feed block 14 is provided with a removable extension 18 which extends beyond theend of the pas- .sag'eways 15 into the center of the orifice 17 so that the materialas it is forced out will form a tube. It is obvious that when the extension 18 is removed the material as it is forced out through the orifice 17 will form a rod.

The guide block 13 to which the feed block 14 is secured, is adjustably mounted, in the present instance, in the head block 2 by means of suitable set screws 19 which permits of the same being adjusted to regulate within small limits the feed block 14.

The head' block 2 is preferably jacketed,- as shown at 20, to permit of water at various temperatures being admitted through the medium ofpipes 21 to regulate the temperatureof the screw chamber 4.

4 In accordance with the present inventlon, black hard rubber compound and red hard.

rubber compound, or any two or more hard rubber compounds preferably of contrasting colors, may, for example, and preferably withoutmixing, be fed into the feed opening 3.

At the time the hard rubber compounds are fed into the feed opening 3 the same are at a suitable temperature for mixing and would ordinarily be pretty thoroughly nixed by the timethe same reached the end of the feed screw 5, at which time the hard rubber compounds originally of different contrasting colors would be substantially one uniform color. In order to overcome this difliculty water at a suitable temperature is circulated in the jacket through the medium of the pipes 21 which acts to keep the screw chamber 4 at a suitable temperature to prevent mixing, the action of the feed screw 5 being such as to force the 10 different colored compounds together so as :10 through the passageways 15 into the contracted orifice 17 to form the finished article.

The black hard rubber compound streaked with red hard rubber compound forms straight lines of various lengths and of contrasting colors, giving a grained appearance to the finished article which extends all the way through the same, the beauty of the article being enhanced by cutting, to further expose the grained effeet, v

From the above it will be seen that means are provided for incompletely mixing or streaking plastic compounds of dlfl'erent 4 colors one with the'other, and'dividing said plastic compounds. into separate passageways through which they are forced to a contracted orifice to produce the finished article with a grained appearance.

While the invention has been described with particular reference to the details of construction, the same isnot to be consid- "ered as llmlted thereto, as many changes can he made and still fall within the scope of the invention set forth in the following claims.

hat I claim is:

1. A machine for graining plastic compounds which comprises a chamber, means for feeding a plurality of plastic compounds of different colors through said chamber and pres ing the same together, means for controlling the temperature of said chamber to prevent mixing of saidicompounds, a plurality of converging passageways, said feed means being adapted to force said plastic con'ipounds through said passageways. and a discharge block having an orifice, said feeding means continuing to force said plastic compounds from said passageways through said discharge block to produce a grained eifect in said compound.

A machine for graining plastic compounds which comprises a screw chamber, a feed screw for feeding a plurality of plastic compounds of different colors through said screw chamber, means for controlling the temperature of said screw chamber to prevent mixing of said compounds, a plurality of converging passageways, said feed screw being adapted to force said plastic compounds through said passageways. and a discharge block having an orifice, said feed screw also acting to force said plastic compounds from said passageways through said discharge block to produce. a grained efl'ect in said compound.

3. The process of graining plastic compounds which consists in mixing but incompletely blending a plastic compound of one color with a plastic compound of a different color, subjecting said compounds to a temperature which will prevent the complete blending thereof, separating said mixed compounds while in a plastic state into a plurality of parts, and finally forcing said parts together to form a grained compound of contrasting colors.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ALFRED o. BUTTFIELD.

Witnesses:

D. E. JONES,

K. J. DURANT. 

